Saiki Kusuo no Ψ-nan announcement for a sequel / second season!

 The announcement has been made at 25th December, however there is still no exact date of the sequel / second season. The official twitter says to watch Gintama!! while waiting.

「斉木楠雄のΨ難」アニメ続編制作決定！？です！詳細はこれからですが、皆さんのご期待に応えるべく、良い形でお届け出来る様、頑張ります！「銀魂」をご覧いただきつつお待ちください！[SP] #斉Ψ #saikikusuo #斉木楠雄のΨ難 https://t.co/GfczOVvU8O pic.twitter.com/MN3viDfWVR

— アニメ「斉木楠雄のΨ難」公式アカウント (@saikikusuo_PR) December 25, 2016

Source: Offical twitter